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by Duncan Epping

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Hyper-Converged is here, but what is next?

Duncan Epping · Oct 11, 2016 ·

Last week I was talking to a customer and they posed some interesting questions. What excites me in IT (why I work for VMware) and what is next for hyper-converged? I thought they were interesting questions and very relevant. I am guessing many customers have that same question (what is next for hyper-converged that is). They see this shiny thing out there called hyper-converged, but if I take those steps where does the journey end? I truly believe that those who went the hyper-converged route simply took the first steps on an SDDC journey.

Hyper-converged I think is a term which was hyped and over-used, just like “cloud” a couple of years ago. Lets breakdown what it truly is: hardware + software. Nothing really groundbreaking. It is different in terms of how it is delivered. Sure, it is a different architectural approach as you utilize a software based / server side scale-out storage solution which sits within the hypervisor (or on top for that matter). Still, that hypervisor is something you were already using (most likely), and I am sure that “hardware” isn’t new either. Than the storage aspect must be the big differentiator right? Wrong, the fundamental difference, in my opinion, is how you manage the environment and the way it is delivered and supported. But does it really need to stop there or is there more?

There definitely is much more if you ask me. That is one thing that has always surprised me. Many see hyper-converged as a complete solution, reality is though that in many cases essential parts are missing. Networking, security, automation/orchestration engines, logging/analytic engines, BC/DR (and orchestration of it) etc. Many different aspects and components which seem to be overlooked. Just look at networking, even including a switch is not something you see to often, and what about the configuration of a switch, or overlay networks, firewalls / load-balancers. It all appears not to be a part of hyper-converged systems. Funny thing is though, if you are going on a software defined journey, if you want an enterprise grade private cloud that allows you to scale in a secure but agile manner these components are a requirement, you cannot go without them. You cannot extend your private cloud to the public cloud without any type of security in place, and one would assume that you would like to orchestrate every thing from that same platform and have the same networking / security capabilities to your disposal both private and public.

That is why I was so excited about the VMworld US keynote. Cross Cloud Services on top of hyper-converged leveraging all the tools VMware provides today (vSphere, VSAN, NSX) will exactly allow you to do what I describe above. Whether that is to IBM, vCloud Air or any other of the mega clouds listed in the slide below is even besides the point. Extending your datacenter services in to public clouds is what we have been talking about for a while, this hybrid approach which could bring (dare I say) elasticity. This is a fundamental aspect of SDDC, of which a hyper-converged architecture is simply a key pillar.

Hyper-converged by itself does not make a private cloud. Hyper-converged does not deliver a full SDDC stack, it is a great step in to the right direction however. But before you take that (necessary) hyper-converged step ask yourself what is next on the journey to SDDC. Networking? Security? Automation/Orchestration? Logging? Monitoring? Analytics? Hybridity? Who can help you reach full potential, who can help you take those next steps? That’s what excites me, that is why I work for VMware. I believe we have a great opportunity here as we are the only company who holds all the pieces to the SDDC puzzle. And with regards to what is next? Deliver all of that in an easy to consume manner, that is what is next!

 

 

 

This blog has been hacked by @vS0ciety

Duncan Epping · Sep 27, 2016 ·

As some seemed to have taken this too serious:

Thanks to all who took part in the viral video hoax today, the vCommunity Rocks – No vBloggers were harmed in the making of this video

— vS0ciety (@vS0ciety) September 27, 2016

How to make a host win the HA Master Election

Duncan Epping · Sep 27, 2016 ·

On the community forums someone asked if it was possible to influence the HA/FDM master election. (For those who don’t know, FDM is the engineering name for vSphere HA.) Let me state first that I wouldn’t recommend doing this, but there actually is a way to make it very likely a certain host becomes the HA master. In this case this customer wanted to influence the outcome of the election as hosts are distributed across rooms and one host is less likely to fail than others due to power layout etc.

The setting is:

fdm.nodeGoodness

The explanation provided is:

When a master election is held, the FDMs exchange a goodness value, and the FDM with the largest goodness value is elected master. Ties are broken using the host IDs assigned by vCenter Server. This parameter can be used to override the computed goodness value for a given FDM. To force a specific host to be elected master each time an election is held and the host is active, set this option to a large positive value. This option should not be specified at the cluster level.

You can set this by manually editing the following file on the host where you want to increase the chances of winning the election:

/etc/opt/vmware/fdm/fdm.cfg

More details about this can be found in this KB, which also lists many other advanced options.

** Disclaimer: This article contains references to the words master and/or slave. I recognize these as exclusionary words. The words are used in this article for consistency because it’s currently the words that appear in the software, in the UI, and in the log files. When the software is updated to remove the words, this article will be updated to be in alignment. **

Running your VSAN witness for a 2 node cluster on a 2 node cluster

Duncan Epping · Sep 20, 2016 ·

A week ago we had a discussion on twitter about a scenario which was talked about at VMworld. The scenario is one where you have two 2-node clusters and for each 2-node cluster the required Witness VM is running on the other. Let me show you what I mean to make it clear:

The Witness VM on Cluster A is the witness for Cluster B, and the Witness VM on Cluster B is the witness for Cluster A. As it stands today this is not a supported configuration out of the box. For ongoing support, it is required that users go through the RPQ process so VMware can validate the design. Please contact your VMware representative for more details.

A knowledge base article should be published on this topic soon, if and when it is published I will update this post and point to it.

Going to VMworld and want to #GiveBack? Buy a shirt!

Duncan Epping · Sep 15, 2016 ·

Joe Baguley pointed me to something cool this week. An intern team in the UK has joined the Million Makers entrepreneurial fundraising challenge and will be selling cool shirts at VMworld of which proceeds will go to the Prince’s Trust.

The Prince’s Trust is a charity in the United Kingdom founded in 1976 by Charles, Prince of Wales to help young people aged 13 to 30 get into jobs, education and training. Many of the young people they help are in, or leaving, care, facing issues such as homelessness or mental health problems, or have been in trouble with the law. Their free programmes give young people the practical and financial support they need to stabilise their lives.

About the challenge, the Million Makers is an entrepreneurial fundraising challenge set by the trust which sees teams of employees from companies across the UK competing to raise at least £10,000 or more over a period of six months. The competition is a learning and development tool proven to build essential business skills and motivate your employees. Teams are invited to pitch their business plan in a Dragons’ Den-style panel of senior business leaders. Presentation skills are put to the test in order to secure £1,500 seed funding from The Prince’s Trust (this has already been secured).

How can you help? Below is the design of the shirt that will be sold through the VMworld store. The cost is going to be 20 Euro and there will only be 120 available at VMworld, so make sure you get one on day 1 as I suspect these will sell out fast, this is how you can GiveBack! I’ve been told that they will also be made available somehow online soon, so for those who are not going to VMworld there will be an option soon to buy one, I will let you folks know where I hear how/where/what. For now, make a mental note and pick one up!

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About the Author

Duncan Epping is a Chief Technologist and Distinguished Engineering Architect at Broadcom. Besides writing on Yellow-Bricks, Duncan is the co-author of the vSAN Deep Dive and the vSphere Clustering Deep Dive book series. Duncan is also the host of the Unexplored Territory Podcast.

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